#region license

// Copyright (c) 2021, andreakarasho
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. All advertising materials mentioning features or use of this software
//    must display the following acknowledgement:
//    This product includes software developed by andreakarasho - https://github.com/andreakarasho
// 4. Neither the name of the copyright holder nor the
//    names of its contributors may be used to endorse or promote products
//    derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#endregion

using System;
using System.IO;
using ClassicUO.IO.Audio.MP3Sharp.Decoding;

namespace ClassicUO.IO.Audio.MP3Sharp.IO
{
    /// <summary> Implements an Obuffer by writing the data to a file in RIFF WAVE format.</summary>
    internal class WaveFileBuffer : ABuffer
    {
        private readonly short[] m_Buffer;
        private readonly short[] m_Bufferp;
        private readonly int m_Channels;
        private readonly WaveFile m_OutWave;

        public WaveFileBuffer(int numberOfChannels, int freq, string fileName)
        {
            if (fileName == null)
            {
                throw new NullReferenceException("FileName");
            }

            m_Buffer = new short[OBUFFERSIZE];
            m_Bufferp = new short[MAXCHANNELS];
            m_Channels = numberOfChannels;

            for (int i = 0; i < numberOfChannels; ++i)
            {
                m_Bufferp[i] = (short) i;
            }

            m_OutWave = new WaveFile();

            int rc = m_OutWave.OpenForWrite
            (
                fileName,
                null,
                freq,
                16,
                (short) m_Channels
            );
        }

        public WaveFileBuffer(int numberOfChannels, int freq, Stream stream)
        {
            m_Buffer = new short[OBUFFERSIZE];
            m_Bufferp = new short[MAXCHANNELS];
            m_Channels = numberOfChannels;

            for (int i = 0; i < numberOfChannels; ++i)
            {
                m_Bufferp[i] = (short) i;
            }

            m_OutWave = new WaveFile();

            int rc = m_OutWave.OpenForWrite
            (
                null,
                stream,
                freq,
                16,
                (short) m_Channels
            );
        }

        /// <summary>
        ///     Takes a 16 Bit PCM sample.
        /// </summary>
        public override void Append(int channel, short valueRenamed)
        {
            m_Buffer[m_Bufferp[channel]] = valueRenamed;
            m_Bufferp[channel] = (short) (m_Bufferp[channel] + m_Channels);
        }

        public override void WriteBuffer(int val)
        {
            int rc = m_OutWave.WriteData(m_Buffer, m_Bufferp[0]);

            for (int i = 0; i < m_Channels; ++i)
            {
                m_Bufferp[i] = (short) i;
            }
        }

        public void close(bool justWriteLengthBytes)
        {
            m_OutWave.Close(justWriteLengthBytes);
        }

        public override void Close()
        {
            m_OutWave.Close();
        }

        /// <summary>
        ///     *
        /// </summary>
        public override void ClearBuffer()
        {
        }

        /// <summary>
        ///     *
        /// </summary>
        public override void SetStopFlag()
        {
        }
    }
}